The need for a new reference point for glasses, at a temperature substantially above the softening point, is discussed from the stand points of development of new glasses, control of properties, and behaviour in application where reworking is required. An apparatus and a procedure are described by which a fibre elongation test indicates the "flow point," or temperature at which a glass reaches a viscosity of (formula). A short section of a glass fibre, nominally 0.65mm. in diameter, is heated under specified conditions of load and heat application.
Origin
Unknown
Journal Title
J. Am. Ceram. Soc., 35 [6] 149-55 (1952)
Sector
Primary Papers
Class
PP 693